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7033154: Improve C1 arraycopy performance

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Better static analysis. Take advantage of array copy stubs.

Reviewed-by: never
This commit is contained in:
Roland Westrelin 2011-04-03 12:00:54 +02:00
parent 00eca5e982
commit f94d7776ca
13 changed files with 720 additions and 146 deletions
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39
hotspot/src/share/vm/c1/c1_Instruction.cpp
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@ -135,6 +135,33 @@ bool AccessIndexed::compute_needs_range_check() {
}
ciType* Local::exact_type() const {
ciType* type = declared_type();
// for primitive arrays, the declared type is the exact type
if (type->is_type_array_klass()) {
return type;
} else if (type->is_instance_klass()) {
ciInstanceKlass* ik = (ciInstanceKlass*)type;
if (ik->is_loaded() && ik->is_final() && !ik->is_interface()) {
return type;
}
} else if (type->is_obj_array_klass()) {
ciObjArrayKlass* oak = (ciObjArrayKlass*)type;
ciType* base = oak->base_element_type();
if (base->is_instance_klass()) {
ciInstanceKlass* ik = base->as_instance_klass();
if (ik->is_loaded() && ik->is_final()) {
return type;
}
} else if (base->is_primitive_type()) {
return type;
}
}
return NULL;
}
ciType* LoadIndexed::exact_type() const {
ciType* array_type = array()->exact_type();
if (array_type == NULL) {
@ -189,16 +216,21 @@ ciType* NewTypeArray::exact_type() const {
return ciTypeArrayKlass::make(elt_type());
}
ciType* NewObjectArray::exact_type() const {
return ciObjArrayKlass::make(klass());
}
ciType* NewArray::declared_type() const {
return exact_type();
}
ciType* NewInstance::exact_type() const {
return klass();
}
ciType* NewInstance::declared_type() const {
return exact_type();
}
ciType* CheckCast::declared_type() const {
return klass();
@ -349,6 +381,11 @@ void Invoke::state_values_do(ValueVisitor* f) {
if (state() != NULL) state()->values_do(f);
}
ciType* Invoke::declared_type() const {
ciType *t = _target->signature()->return_type();
assert(t->basic_type() != T_VOID, "need return value of void method?");
return t;
}
// Implementation of Contant
intx Constant::hash() const {